MOPL012
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
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MOPL012 |
Residual Dose Measurement and Activation of the Injection Area in the J-PARC RCS | |
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| In the 3 GeV Rapid Cycling Synchrotron (RCS) of Japan Proton Accelerator Research Complex (J-PARC), we adopted multi-turn H charge exchange injection by using stripper foil in order to achieve high power proton beam. It is therefore impossible to neglect the interaction between stripper foil and the beam. As a result, there are high residual dose measured around the stripper foil. Based on detail numerical simulations by using PHITS code, it is identified that the secondary particles produced in the nuclear reactions due to foil beam interaction caused the high residual activity around foil. In this paper, we report a detail measurement of the residual dose around the stripper foil together with the cause estimated based on simulation studies. | ||
| THAM6X01 | The Path to 1 MW: Beam Loss Control in the J-PARC 3-GeV RCS | 1 |
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| The J-PARC 3-GeV RCS started 1-MW beam test from October 2014, and successfully achieved a 1-MW beam acceleration in January 2015. The most important issues in realizing such a high power routine beam operation are control and minimization of beam loss. This talk will present the recent progress of 1-MW beam tuning, especially focusing on our approaches to beam loss issues. | ||
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Slides THAM6X01 [1.854 MB] | |